As per my earlier post How to transform between a double date-time and std::string in C++, some things are surprisingly hard in C++, especially compared to writing in a .NET language. I recently tracked down this useful snippet of code on the internet in order to recursively build a list of files matching some file extension under a folder. This only compiles on Windows – if you want something cross-platform, look at boost (I wanted to avoid bringing the boost filesystem library into my project as yet another dependency).